Electrode



Sept. 2, 1930. M. 0. SEM

ELECTRODE Filed May 14, 1928 w m W 5.. an

attonwq Patented Sept. 2, 1930 UNITED STATES PATENT OFFICE IA'IHIAS OVR-OM sum, or BUFFALO, NEW YORK, 'AssreNoR TO nii'r Nonsxn Ax'rm- SELSKAB FOR ELEKTROKEMISK INDUSTRI or NORWAY, or OSLO, NORWAY ELECTRODE Applicatlon filed May 14, 1928, Serial No. 277,671, and in Norway Ka y 21, 1927.

The present invention relates to continuous electrodes which are baked while in use in the electric furnace and consist of a baked and an unbaked part. The object of the in 5 vention is an electrode having a form difiering from that previously used and being more convenient for certain purposes. Continuous electrodes are generally produced by tamping a raw electrode mass of relatively 10 low viscosity into'a casing acting as a mould.

This casing is generally made of thin sheetiron of 11.5 millimeter thickness such as described in S. A. Patent No. 1,440,724. The casing is in most cases built up from cylindric sections which may be provided with ribs internally. The electrode will thus get a circular cross section. This form is very advantageous as the circular cross section will not be subject to any change of form after the mass has been tamped in place and exerts a static pressure against the sides of the casing. I have however found that for technical reasons it will in certain cases be desirable, especially with threephase furnaces with 3 electrodes placed in the same row, to give such electrodes a more oblon or rectangular form. I effect this by ma ing casings and electrode holders rectangular or 0blong. One runs the risk, however, that the comparatively fluid mass within the thin sheet-iron casing will press its walls outwards. Thiswill cause the electrode to stop when reaching the holder and a regular low erin g of the electrode as it is consumed in the.

furnace is made diflicult.

This difiiculty is according to the present invention avoided by providing my electrodes having a rectangular or m'long cross mental to the electrothermic process in which the electrode is to be'used. The reinforcements are arranged according to'usual mechanical principles to give the casing the desired strength.

Generally it will be advantageous to use the same material in the reinforcements as in casing and ribs and to arrange them parallel to the short axis of the electrode cross section. My invention is however in no way limited thereto. In -the drawing forming part of the application a suitable mode of application of the present invention is illustrated: The electrode is here composed of 3 circular casings whereby great mechanical strength is attained. Fig. 1 shows an elevation of the electrode provided with a holder, Fig. 2 shows'a section through 22. 1 is the electrode casing which may be considered a combination of three cylindrical casings l, 1 and 1. The casings arein the usual Way provided with ribs 2. 3 shows the reinforcements which extend through the electrode mass and connect the long sides of the electrode. These reinforcements or connections are arranged at certain intervals upwards in the whole length of the electrode casing and are connected to the wall of the casing or the internal ribs by welding or in other known way. 4 illustrates an electrode holder consisting of a ring with gripping members 5. The electrode holder is here made in conformity with the cross section of the electrode. The suspension device for the electrode holder is not shown in the drawing.

What I claim as new and desire to secure by -Letters Patent of the United States is:

unbaked part, the cross section of said electrode being oblong and being provided with a connecting members extending from one side of the electrode to the other.

3. Electrode comprising a baked and an unbaked part, the cross section of said. electrode being extended more in one direction than in the other and being provided with connecting members extending from one side of the electrode to the other in the direction of the short axis of the electrode.

4. Electrode comprising a baked and an unbaked part, the cross section of said electrode being oblong and being provided with connecting members extending from one side of the electrode to the other in the direction of the short axis of the electrode.

5. Electrode comprising a baked and an unbaked part, the cross section of said electrode being extended more in one direction than in the other and having a circumference composed of individually circular parts so as to be self-sustaining when exposed to pressure from the soft paste in the unbaked part of theelectrode.

6. Electrode comprising a baked and an unbaked part, the cross section of said electrode being more extended in one direction than in the other and having a circumference composed of individually circular parts with connecting members attached where two cir cular parts meet.

7. Electrode comprising a baked and an unbaked part, the cross section of said electrode being oblong and having a circumference composed of individually circular parts with connecting members attached where two circular parts meet.

8. Electrode characterized by an oblong cross section and comprising a baked portion and an unbaked portion and a surrounding mantle in combination with reenforcing members cross-connecting the sides of the mantle internally.

9. Electrode comprising a baked portion and an unbaked portion and a surrounding mantle, the cross-section of the electrode being extended more in one direction than in the other, and reinforcements for sustaining the mantle against deformation under pres- I sure of the soft paste in the unbaked portion of the electrode. I

10. Electrode comprising a baked and an unbaked portion, the cross-section of the electrode being extended more in one direction than in the other, and the thickness of the electrode transversely being different at different points along the longer axis of the electrode to thereby increase the self-sustainin g characteristics of the electrode against the pressure of the soft paste in. the unbaked portion of the electrode.

MATHIAS OVROM SEM'. 

